Gwt-gdata authentication
I am writing an application with GWT and I found on the internet that there is a library out there that uses gdata functions easily. Specifically, I need to use the Google Calendar integration. I followed the official guide on the gwt-gdata site to authenticate ( http://code.google.com/p/gwt-gdata/wiki/GettingStarted ), but unfortunately I got an error. This is mistake:
17:59:12.463 [ERROR] [testmappa] Unable to load module entry point class testMappa.client.TestMappa (see associated exception for details)
com.google.gwt.core.client.JavaScriptException:
(TypeError): $wnd.google.accounts is undefined
fileName: http://127.0.0.1:8888
lineNumber: 29
stack: ("http://www.google.com/calendar/feeds/")@http://127.0.0.1:8888:29
connect("http://127.0.0.1:8888/TestMappa.html?gwt.codesvr=127.0.0.1:9997","`gL1<a3s4B&Y{(Ci","127.0.0.1:9997","testmappa","2.0")@:0
((void 0),"testmappa","http://127.0.0.1:8888/testmappa/")@http://127.0.0.1:8888/testmappa/hosted.html?testmappa:264
z()@http://127.0.0.1:8888/testmappa/testmappa.nocache.js:2
(-2)@http://127.0.0.1:8888/testmappa/testmappa.nocache.js:8
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:195)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:120)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:507)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:264)
at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
at com.google.gwt.accounts.client.User.login(User.java)
at testMappa.client.TestMappa.onModuleLoad(TestMappa.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:369)
at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:185)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:380)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:222)
at java.lang.Thread.run(Thread.java:637)
I cannot figure out the reason for this error. My code is simple:
String scope = "http://www.google.com/calendar/feeds/";
User.login(scope);
And as far as I know, it should work as it is. I dont know what to do and I am here to ask how to solve this problem and if I can use native java gdata library directly, but I believe this other thing cannot be done for client side gwt code (so how the code will be converted to javascript).
Thanks.
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The two lines of code you pasted above should really go into the run method like this -
if (GData.isLoaded (GDataSystemPackage.CALENDAR)) {
Window.alert ("Package is loaded");
} else {
GData.loadGDataApi ("MyApiKey",
new Runnable () {
public void run () {
String scope = "http://www.google.com/calendar/feeds/";
User.login (scope);
// remaining code comes in here. you may create a new method
// and call it from here.
}
},
GDataSystemPackage.CALENDAR);
}
If you don't download the GData Api code, you will probably get the javascript error you are pasting.
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